From Source: MakeUseOf
The very first thing I should mention is that when it comes to Facebook, there’s really no such thing as “hack codes.” The title of this article is partially tongue-in-cheek, because with Facebook, the rules change so often that one “Facebook hack” code that works today will likely not work tomorrow. Facebook designers change links and features at whim – and you’re left trying to guess what’s coming next and why your link or plug-in no longer works.
You've probably already seen a few of these, but it's worth a bookmark so you can have them all together in one place. There are a couple of real gems here.
See the List
The Accidental Billionaires: The Founding of Facebook: A Tale of Sex, Money, Genius and Betrayal
Facebook: The Missing Manual
Facebook Cookbook: Building Applications to Grow Your Facebook Empire